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Characterization and Inheritance of Six Microsatellite Loci in Lake Sturgeon
Author(s) -
McQuown Eve,
Gall Graham A. E.,
May Bernie
Publication year - 2002
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(2002)131<0299:caiosm>2.0.co;2
Subject(s) - biology , mendelian inheritance , lake sturgeon , microsatellite , genetics , allele , evolutionary biology , population , inheritance (genetic algorithm) , sturgeon , zoology , acipenser , fishery , gene , fish <actinopterygii> , demography , sociology
The lake sturgeon Acipenser fulvescens is a threatened species historically found in the Mississippi, St. Lawrence, and Hudson River drainage basins of North America. The complexity of the lake sturgeon genome necessitates confirmation of the Mendelian inheritance of molecular markers before its use in population‐genetic studies. Six microsatellite loci were used to examine inheritance patterns in six lake sturgeon families. Three loci ( Spl120*, Aox27* , and Afu68b* ) conformed to a simple, disomic model of Mendelian inheritance. Homeologous loci were observed for Aox27* and Afu68b. Banding patterns, gametic segregation patterns, and evidence of double‐reduction events in the progeny support a tetrasomic mode of inheritance at three loci ( Spl35*, Spl101* , and Spl106* ). A model of inheritance was not tested for these presumptive duplicated loci due to the small number of observations of each phenotype. A number of aberrant progeny phenotypes were observed that could have resulted from double reduction, mutation, unreduced gametes, or null alleles. The results indicate that the lake sturgeon genome is evolving from tetrasomy to disomy. We caution that attention should be paid to the quality of artificial fertilization in the production of lake sturgeons for supplementing natural populations.